// 返回顶部按钮样式的变量
:root {
    --back-to-top-z-index: 5;
    --back-to-top-color: #ada0a0;
    --back-to-top-color-hover: #000;
    @media (prefers-color-scheme: dark) {
        --back-to-top-color: #ada0a0;
        --back-to-top-color-hover: #fff;
    }
}
// 返回顶部按钮样式位置
.back-to-top {
    bottom: 3rem;
}
body {
    margin: 0;
    color: rgba(0, 0, 0, 0.85);
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
        Helvetica Neue, Arial, Noto Sans, sans-serif, Apple Color Emoji,
        Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji;
    font-variant: tabular-nums;
    line-height: 1.5715;
    background-color: #fff;
    font-feature-settings: "tnum";
    overflow-x: hidden;
}

ul li {
    list-style: none;
}

a {
    color: #000;
    text-decoration: none;
}

.iconfont::before {
    padding-right: 10px;
}
